In order to hard reset a Orange Miami, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Orange Miami device will be brought back to the default configuration of a brand new device.
1. Power up the phone.
2. Type in this code: *983*57#
3. A "Delete Test Data and Restart?" message will appear on-screen. Confirm and allow your phone to reset'n'restart.